Abstract
The Rufous Casiornis, Casiornis rufus (Vielliot, 1916), is widespread in central South America, reaching its southernmost distribution in northern Argentina and Uruguay. Here we present the first nine records of the species for Rio Grande do Sul state, southern Brazil. The records were documented with photographs and consisted mostly of lone individuals observed in riparian forests inserted in a matrix of grasslands and rice fields. The Rufous Casiornis apparently occurs in very low densities in the region. More observations are needed to elucidate its status of occurrence in Rio Grande do Sul.
Highlights
The Rufous Casiornis, Casiornis rufus (Vielliot, 1916), is widespread in central South America, occurring from northern Peru and Bolivia to central and northern Brazil, and south to the Uruguayan departments of Artigas and Rivera (Rocha 2008; Azpiroz 2012), and the Argentine provinces of Corrientes, Entre Ríos, Santa Fé and Buenos Aires (Ridgely and Tudor 1994; Scholes 2004)
The records were documented with photographs and consisted mostly of lone individuals observed in riparian forests inserted in a matrix of grasslands and rice fields
We report the first observations of the Rufous Casiornis in this state
Summary
The Rufous Casiornis, Casiornis rufus (Vielliot, 1916), is widespread in central South America, occurring from northern Peru and Bolivia to central and northern Brazil, and south to the Uruguayan departments of Artigas and Rivera (Rocha 2008; Azpiroz 2012), and the Argentine provinces of Corrientes, Entre Ríos, Santa Fé and Buenos Aires (Ridgely and Tudor 1994; Scholes 2004). Abstract: The Rufous Casiornis, Casiornis rufus (Vielliot, 1916), is widespread in central South America, reaching its southernmost distribution in northern Argentina and Uruguay. We present the first nine records of the species for Rio Grande do Sul state, southern Brazil.
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